ansible的配置文件一点要多考虑，有些设定比如ssh端口啊用户啊线程啊都尽量在里面调节好
iventory的话/etc/ansible/hosts 里面可以使用正则匹配
ansible从inventory开始就从inventory开始给你们讲起来
1.hosts文件的基本构成是hosts hosts可以构成组也就是group，group可以构成大组
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[atlanta]
host1
host2
[raleigh]
host2
host3
[southeast:children]
atlanta
raleigh
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2.hosts可以有自己的变量group可以设定公用的变量
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[atlanta]
host1 http_port=80 maxRequestsPerChild=808
host2 http_port=303 maxRequestsPerChild=909
[atlanta]
host1
host2
[atlanta:vars]
ntp_server=ntp.atlanta.example.com
proxy=proxy.atlanta.example.com
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3.书写方式有两种列表和yml
4.inventory支持匹配
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[webservers]
www[01:50].example.com
[databases]
db-[a:f].example.com
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5.默认有一个all组包含所有的hosts
6.还可以以文件的形势记录我们的变量
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/etc/ansible/group_vars/raleigh # can optionally end in '.yml', '.yaml', or '.json'
/etc/ansible/group_vars/webservers
/etc/ansible/host_vars/foosball
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---
ntp_server: acme.example.org
database_server: storage.example.org
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7.常见的变量
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ansible_host
ansible_port
ansible_user
ansible_ssh_pass 通常不使用明文，使用vault（老子不会啊）
ansible_ssh_private_key_file
ansible_ssh_executable
This setting overrides the default behavior to use the system ssh. This can override the ssh_executable setting in ansible.cfg.
ansible_become
ansible_become_method
ansible_become_user
ansible_become_pass
ansible_shell_type
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8.ansible可以和cobbler这也得批量装机工具管理动态inventory很复杂，在云上环境用的也不多。